[1] Vrije Univ Amsterdam, Med Ctr, Ctr Diabet, Dept Internal Med,Sect Endocrinol, Amsterdam, Netherlands
[2] Sahlgrens Univ Hosp, Lundberg Lab Diabet Res, Gothenburg, Sweden
[3] Univ Helsinki, Cent Hosp, Dept Med, Helsinki, Finland
[4] Minerva Med Res Inst, Helsinki, Finland
[5] Eli Lilly & Co, Houten, Netherlands
[6] Eli Lilly & Co, Indianapolis, IN 46285 USA